#include <Arduino.h>

const int butPin1 = 6; //connect button to digital pin 6
const int butPin2 = 7; //connect button to digital pin 7
const int led1 = 4;
const int led2 = 5;
int data;
int led1ON;
void setup()
{
  Serial.begin(9600);
  pinMode(butPin1, INPUT);
  pinMode(butPin2, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  digitalWrite(butPin1, HIGH);
  digitalWrite(butPin2, HIGH);
  Serial.flush();
  delay(20);
}

void LED1()
{
  data = Serial.read();

  if (data == 'A')
  {

    digitalWrite(led1, HIGH);
    led1ON = 1;
    Serial.write(9);
    Serial.flush();
    delay(20);
  }
}

void LED2()
{
  digitalWrite(led2, HIGH);
}

void offLED1()
{
  if (digitalRead(butPin1) == LOW)
  {
    digitalWrite(led1, LOW);
    led1ON = 3;
    Serial.write(8);
    Serial.flush();
    delay(20);
  }
}
void loop()
{

  //digitalWrite(led1, HIGH);
  data = Serial.read();
  Serial.flush();
  delay(20);
  offLED1();
  LED1();
  LED2();
  if (digitalRead(butPin2) == LOW)
  {
    Serial.write(7);
    Serial.flush();
    delay(20);
  }
  Serial.write(0);
}